Is the CSV to JSON Converter free to use?

Yes, the CSV to JSON Converter is completely free. No account, subscription, or signup is required — ever.

Does my data get uploaded anywhere?

No. The CSV to JSON Converter runs entirely in your browser. Your data is never sent to any server.

Does it work offline?

Yes. Once the page has loaded, the tool works without an internet connection.

Which browsers are supported?

All modern browsers — Chrome, Firefox, Safari, and Edge. No plugins or extensions required.

Will number values be converted to actual JSON numbers?

CSV has no type system, so all values are initially parsed as strings. The tool outputs string values by default. If you need typed numbers, you'll need to post-process the JSON in your application.

CSV to JSON Converter

Convert CSV data to JSON format with custom delimiter support.

Delimiter

First row is header

Indent

CSV Input

JSON Output

JSON output appears here

What is the Free CSV to JSON Converter?

The free CSV to JSON Converter transforms comma-separated or delimited text into clean JSON you can use in APIs, JavaScript applications, or databases. Paste your CSV into the input panel, set the Delimiter (comma, semicolon, tab, or pipe), toggle Has Header Row to control whether the first row becomes the key names, and choose an Indent level for pretty-printing. The JSON output appears instantly — no upload, no sign-up.

→ Converting exported spreadsheet data into JSON for a web application
→ Transforming CRM or database exports from CSV into a JSON API payload
→ Converting tab-separated data files (TSV) downloaded from analytics tools
→ Building mock data fixtures from spreadsheet data for development testing

How to Use the Free CSV to JSON Converter

1 Paste your CSV data into the input textarea.
2 Set the Delimiter to match your data (comma, semicolon, tab, or pipe).
3 Toggle Has Header Row on if the first row contains column names.
4 Choose an Indent size (2 or 4 spaces) for pretty-printed output.
5 Copy the JSON output or click Download to save it as a .json file.

Key Features

🔀
Four delimiter options

Handles comma, semicolon, tab (TSV), and pipe delimiters.
📋
Optional header row

Toggle header detection to use the first row as JSON key names.
🎨
Configurable JSON indent

Choose 2 or 4 spaces, or minified output — whatever your project needs.
⚡
Instant output

JSON appears as you type or paste — no submit button.
🔒
Free and private

100% in-browser — your data never leaves your device.

Example Usage

Example Input

name,age,city
Alice,30,Lagos
Bob,25,Abuja

Example Output

[{"name":"Alice","age":"30","city":"Lagos"},{"name":"Bob","age":"25","city":"Abuja"}]

Frequently Asked Questions about the Free CSV to JSON Converter

What is the free CSV to JSON Converter?: Convert CSV data to JSON format with custom delimiter support.
Is the CSV to JSON Converter free to use?: Yes, the CSV to JSON Converter is completely free. No account, subscription, or signup is required — ever.
Does my data get uploaded anywhere?: No. The CSV to JSON Converter runs entirely in your browser. Your data is never sent to any server.
Does it work offline?: Yes. Once the page has loaded, the tool works without an internet connection.
Which browsers are supported?: All modern browsers — Chrome, Firefox, Safari, and Edge. No plugins or extensions required.
Will number values be converted to actual JSON numbers?: CSV has no type system, so all values are initially parsed as strings. The tool outputs string values by default. If you need typed numbers, you'll need to post-process the JSON in your application.